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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>HTML基础知识</title>
</head>
<body>
    <h1>一号标题</h1>
    <h2>二号标题</h2>
    <h3>三号标题</h3>
    <h4>....</h4>
    <p>段落前后会换行相当于2个br标签</p>
    <br>
    <a href="https://github.com/dengjiawen8955/NMID">a标签是一个连接,在里面用连接href=“你的网站”</a>
    
</body>
</html>